I'd have thought that the security services, NRO for example, have software that receives scans of paper strips and does edge matching to reconstruct the page.
It doesn't seem too hard algorithmically (to this non-programmer) to do that, something like: take all strips and analyse them for position of edge markings; take all edges and compare the edge-marking positions giving a matching score by pair, match up the best scores and display to a user for final arrangement.
If you were looking at fragments of paper I'd probably go with a letter matching based on pre-analysis of the font used (by machine). use the letter matching to arrange the fragments as if they were strips and proceed from there.
It doesn't seem too hard algorithmically (to this non-programmer) to do that, something like: take all strips and analyse them for position of edge markings; take all edges and compare the edge-marking positions giving a matching score by pair, match up the best scores and display to a user for final arrangement.
If you were looking at fragments of paper I'd probably go with a letter matching based on pre-analysis of the font used (by machine). use the letter matching to arrange the fragments as if they were strips and proceed from there.
I'd be amazed if such things don't exist.
We shred and compost if more security is needed.